Regulating apparatus.



E. J. TRIMBEY. REGULATING APPARATUS. APPLICATION FILED SEPT. 15. I915.

llIl/EA/TOR 7/ /0766] BY I Patented Apr. 4, 1916.

zdmr dcjames H II'" anon/VH5 I .Glens Falls, Warren county,

EDWABDJ'. TRIMBEY, OF GLENS FALLS, NEW YORK.

nneumrme APPARATUS.

having a discharge orifice maintained-under 1 178 194 Specification of Letters Patent.

a lication 'filed September 15, 1915. Serial No. 50,789. To all 307mm it may concern:

Be 1t known that I, EDWARD J, TRIMBEY, a

citizen of the United States, residing at State of New Y'ork,have invented certain new and useful Improvements in Regulating Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled .in the art to which it appertains to make and'use the same.

In the present state of the art of paper maln'ng' there is no rapid method of determining the per cent. consistency of the wet pulp as it is pumped to the heaters or to the 1 mixing tanks, or of wet paper stockas it is such percentage of bone-dry matter is com-.

pumped -to the head-box of the paper machine or of the Jordan engine where itis to be further refined. Such pulp or paper five parts of bone-dry matter in one hundred stockcommonly consists of about three to parts of wet pulp or wet paper stock, and

per cent. conily determined, and the regulation of the pulpconsistency thereby eifected.

It is important in the manufacture of paper, that the pulp or paper stock should have the proper consistency, and that, when the.pulp or paper stock is too thick, the

" proper amount of water should be added, so

a manner, but it will be understoodthat the.

term pulp, when .thus referred to, is used that the pulp or paper stock shall be of uniform consistency, and the resulting paper of uniform weight per unit area.

. The invention will bedescribed more particularly m connection with 'theregulationof pulp inasmuch as regulation of paper stock is eifected in substantially the same with a more general signification.

The novel apparatus of the present inven-:

tion is similar to that of my Patent No. 1,161,168, granted November 23, 1915, and comprises, bnefly,'a constant level chamber drawings, in which a constant head of the pulp or paper stock, and a variable level chamber arran ed to rece1v e the pul or paper stock discharged from said ori cc and provided with an'outlet pipe of suitable size and proportion to ,cause a frictional resistance to the flow of the pulp or paper'stock therethrough, and thereby maintain a head of the pulp or paper stock within the chamber vary- Patenteti Apnea, 1916.

ing with its consistency and frictional resistance. Thepresent invention is distingulshed from that of said prior application in that the variable level chamber is yieldably supported, an d is provided with indi-j catmg means, operated by the movements of the chamber, for indicating the pulp or 1 paper stock consistency, and the dilution necessary to give a predetermined lower con-' sistency.

I will now proceed to describe my inven-- tion more in detail with reference to the construction illustrated on the accompanying Figure 1 shows, partly in elevation and partly in section, an arrangement of appa ratus embodying-the invention; Fig. 1s a top view of part of the apparatus of Fig. 1

and Fig. 3 is anothertop-view of-another part of the apparatus of Fig. 1. I In'theconstruction illustrated, the constant level chamber 1 is provided with an overflow dam or partition 2 dividing the same into two compartments 3 and 4.. The compartment 3. is provided in its bottom with an opening 5 covered with a-thin sheet of metal having therein a discharge orifice stock enters the compartment 3, this flow being regulated by a suitable tvalve 8. The supply pipe 7 is shown as a branch leading from the main supply pipe 9 through which the pulp or paper stock is fd to the paper machine or to other suitable place of use or of furthertreatment. A suitable""circulatingpump is indicated at 10,'anda regulable water supply pipe at 12, the main stufi' chest being indicated at 11. From the" compartment 3 the excess pulp overflows into the compartment 4 and is returned by means of the pipe 13 to the stufi chest 11.'

Positioned belowthe discharge orifice 6 -6. A supply pipe 7- for the pulp or paper is a variable level chamber 14 provided'with a restricted outlet pip or pout 15 discharg-. ing at 16 into the br hch 1 7 of the return 1 0 pipe 13 leading to the stuff chest 11. The outlet of this variable level chamber is of a suitable size and proportion to cause a frictional resistance to the passage of the pulp therethrough and thereby maintain a head of pulp within the chamber varying with the pulp consistency. The variable level chamber 14 is yieldably supported on an arm 18 pivoted at 19 to the support 20. The arm 18 has a counter-weight 21 and is connected at its end at 22 by a yielding connection to the support 27 at 23. The yielding connection is indicated as a member 24 having therein a suitable spring, and also having two scales 26 with which a pointer cooperates.

In the operation of the apparatus, a suitable portion of the pulp or paper stock is drawn ofl' by the branch pipe 7 from the main supply pipe 9, and is introduced into the bottom of the compartment 3. The excess pulp overflows the partition 2 and returns to the stuff chest, thereby maintaining a constant head Within the compartment 3. From the bottom of this compartment the pulp is discharged under this constant head into the variable level chamber 14:. The rate of fiow into this second of pulp or its level chamber is determined by the size of the orifice 6, and is relatively constant owing to the constant head and to the minimum of frictional resistance offered to the passage of the pulp through the thin orifice. The head within the chamber 14 is largely controlled by the frictional resistance opposing the fiow of the pulp or paper stock through the outlet therefrom. This frictional resistance will vary with the per cent. consistency of the pulp or paper stock, the head increasing with the increase in consistency until it is suificient to overcome the frictional resistance. The level of the pulp will accordingly indicate the consistency of the pulp and the amount of water which must be added to dilute it to a predetermined lower consistency.

In the construction illustrated, the head within the chamber 14, is indicated by the pointer 25 upon the scale 26. The counter-weight 21 can be adjusted to overcome the weight of the chamber 15 and its contained pulp or paper stock when such pulp or paper stock is of the desired conslste'ncy. Any increase in consistency will cause an increase in the head within the chamber 14 with resulting increase in Wei 'ht, this increase in weight being due to the increase in head.

.When using this apparatus, it is advantageous to have the pulp in the supply chests at a somewhat higher consistency than it is desired to maintain at the head box' of the paper machine or in the heaters or mixing tanks, and to add a suitable amount of water for thinning to the proper consistency; for,

while the wet pulp or wet paper'stock can be easily diluted if of a too high consistency, it cannot be readily thickened if too dilute.

As it is the general practice to use a head box in which a constant level is maintained, for regulating the supply of the pulp or'paper stock to the paper machine or to the Jordan engine, the orifice 6 can be located in the bottom of the regular head-box in such cases. Such head-boxes will accordingly correspond to the box or constant level chamber 1, illustrated.

It will be seen that the discharge through the orifice 6 is relatively constant, inasmuch as this discharge takes place under a constant head. Such slightvariations as may occur in practice do not interfere with the satisfactory operation-of the apparatus. It will-also be seen that the discharge spout 15 of the chamber 14: is of considerable length so that a considerable frictional resistance is offered to the passage of the pulp therethrough, this resistance increasing with increase in the pulp consistency, and vice versa. The increase in head of pulp, and consequently in level within the variable level 'chamber 14, will be indicated upon the scale 26 by the pointer 25. Two scales are shown, one of which is calibrated in termsof the pulp consistency, and the other in terms of the water which must be added to give the proper dilution. Accordingly, with the apparatus of the present invention, the operator can continually observe the consistency of the pulp, as indicated on the calibrated scale, and can also determine by inspection the amount of water which must be added to give the proper dilution. Complete con.- trol of the pulp consistency is thus provided for, so that the operator can readily regulate the water supply in accordance with the consistency of the pulp and thus obtain a paper of uniform weight per unit area.

While the invention has been described more rticularly in connection with the embodiment thereof illustrated in the accompanying drawings, yet it will be understood that variations and modifications can be made therein without departing from the spirit and scope of the invention as set forth in the accompanying claims.

What I claim is I 1. A regulating apparatus for wet pulp and wet paper stock, comprising a constant level chamber having a discharge orifice maintained under a constant head of the pulp or paper stock, a yieldably su ported variable level chamber arranged to receive the pulp or paper stock discharged from said orifice and provided with an outlet pipe of suitable size and proportion to cause a frictional resistance to the flow of the pulp or paper stock therethrough, and thereby maintain a head of the pulp or paper stock within the chamber varying with its consistency and frictional resistance, and means in connection with said yieldable support for indicating variations in the head of the pulp or paper stock in said chamber; substantially as described.

2.'A regulating apparatus for Wet pulp, and wet paper stock, comprising a constant level chamber having a discharge orifice maintained under a constant head of the pulp or paper stock, a yieldably supported variable level chamber arranged to receive the pulp or paper stock discharged from said orifice and provided with an outlet pipe of suitable size and proportion to .yieldable support being extending discharge neck, said discharge port1on and neck beingof suitable size and proportion to cause a frictional resistance to the flow of the pulp or paper stock thereextending downwardly v, therefrom and terminating in an upwardly through, and thereby maintain a head of the pulp or paper stock within the upper portlon of the chamber varying with its consistency and frictional resistance; substantially as described.

. 4. A regulating apparatus for wet pulp and wet paper stock, comprising a constant level chamber having a discharge orifice maintained under a constant head of the pulp or paper stock, a pivotally supported variable level chamber arranged to receive the pulp or paper stock discharged from said orifice and provided with an outlet pipe of suitable size and proportion to cause a frictional resistance to the flow of the pulp or paper stock therethrough, and thereby maintain a head of the pulpor paper stock within the chamber varymg with its consistency and frictional resistance, a support for said variable level chamber,

a supporting arm to one end of which said chamber is pivoted, a counter-weight upon the other end of said arm, and a yielding connection arranged between said arm and support provided with a scale and pointer for indicating variations in the head of the pulp or paper stock and corresponding variations 1n the consistency thereof; substantially as described.-

In testimony whereof I afiix my signature EDWARD J. TRIMBEY. 

